Pony Creek Watershed The Pony Creek Watershed was established in April of 1961. Land treatment measures were installed by farmers utilizing cost share programs. An important function of these conservation practices was to reduce run-off to the many severe gully heads in the steep topography of the watershed. Level and basin terraces were used to retain water reducing erosion into downstream structures. Planned construction consisted of 21 grade stabilization and sediment control structures, two floodwater structures, and 4.3 miles of channel improvement in the outlet channel over the Missouri River bottomland portion of the watershed. Five of the above structures served as public road crossings and four existing bridges or culverts were replaced. Pony Creek Watershed is a tributary of Keg Creek and has a drainage area of 19,329 acres or 30.2 square miles. Approximately 17,804 acres lie in Mills County and 1,525 acres in Pottawattamie County. The watershed is about 15 miles long with an average width of about 2 miles and a maximum width of 4 miles. Pony Creek heads in Pottawattamie County, flows in a southerly direction, and enters Keg Creek about two miles south of Pacific Junction. Keg Creek flows into the Missouri River one and a half miles below the Pony Creek outlet. Close this window to return to Watersheds page